Added missing check against handling invalid bounding sphere's
Added missing check against handling invalid bounding sphere's


scrawl/osg,jtorresfabra/osg,openscenegraph/osg,tomasthoresen/osg,tomasthoresen/osg,marchelbling/osg,scrawl/osg,tomasthoresen/osg,openscenegraph/osg,jtorresfabra/osg,artoolkit/osg,marchelbling/osg,openscenegraph/osg,scrawl/osg,marchelbling/osg,marchelbling/osg,artoolkit/osg,jtorresfabra/osg,tomasthoresen/osg,jtorresfabra/osg,scrawl/osg,openscenegraph/osg,artoolkit/osg,artoolkit/osg